US8505534B2 - Humidifying device for breathing gases - Google Patents

Humidifying device for breathing gases Download PDF

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Publication number
US8505534B2
US8505534B2 US12/706,240 US70624010A US8505534B2 US 8505534 B2 US8505534 B2 US 8505534B2 US 70624010 A US70624010 A US 70624010A US 8505534 B2 US8505534 B2 US 8505534B2
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Prior art keywords
water
evaporating chamber
float element
set point
humidifying device
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US20100242963A1 (en
Inventor
Kai Brieger
Thomas Rossen
Markus Kämer
Ludger Tappehorn
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Draegerwerk AG and Co KGaA
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Draeger Medical GmbH
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Assigned to DRAEGER MEDICAL AG & CO. KG reassignment DRAEGER MEDICAL AG & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRIEGER, KAI, KAEMER, MARKUS, ROSSEN, THOMAS, TAPPEHORN, LUDGER
Publication of US20100242963A1 publication Critical patent/US20100242963A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • A61M16/162—Water-reservoir filling system, e.g. automatic
    • A61M16/164—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system
    • A61M16/165—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system with a float actuator
    • A61M16/168—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system with a float actuator having a dual float
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • A61M16/162—Water-reservoir filling system, e.g. automatic
    • A61M16/164—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system
    • A61M16/165—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system with a float actuator
    • A61M16/167—Water-reservoir filling system, e.g. automatic including a liquid inlet valve system with a float actuator acting vertically on the valve
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • A61M2205/123—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated reservoirs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • A61M2205/128—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3306—Optical measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3382—Upper level detectors

Definitions

  • the present invention pertains to a humidifying device for breathing gases and to a process for operating a humidifying device for breathing gases.
  • the humidifying device contains a refillable evaporating chamber, which is intended to receive water that is to be evaporated.
  • the evaporating chamber is arranged in contact with a heater within a housing.
  • the evaporating chamber contains a water feed means, into which water enters under the force of gravity from a water reservoir through an opening.
  • breathing gas which will be heated and humidified in the evaporating chamber, enters through another opening into the evaporating chamber.
  • the water reserve in the evaporating chamber may be used up rapidly during the respiration of the patients, which often lasts for days, with a corresponding humidification of the breathing gas.
  • a necessary refilling of the water in the evaporating chamber is carried out according to the state of the art continuously by means of a valve technique developed especially for this purpose, as it is described, for example, in DE 693 23 518 T2.
  • automatic filling of the evaporating chamber with water is limited because of the limited volume of the water reservoir, as a result of which further humidification of the breathing gases cannot take place any longer when the water in the reservoir has been consumed.
  • the object of the present invention is to eliminate the above-mentioned drawbacks. This object is accomplished by a device and a process according to the present invention.
  • a humidifying device for breathing gases is characterized in that the humidifying device comprises a housing with a recess, a heater, an evaporating chamber with a water feed means, a breathing gas feed channel, a breathing gas outlet channel and at least one float element and at least one filling level indicator, wherein said evaporating chamber can be introduced at least partially into said recess, is in contact with the heater for heating water and is designed to take up water from a water reservoir through the water feed means, wherein the at least one float element is guided in a floatingly movable manner on the water and is designed to close the water feed means above a water level set point in the evaporating chamber, and the at least one filling level indicator is designed to recognize lowering of the water from the water level set point as a function of the position of the at least one float element.
  • the humidifying device according to the present invention for breathing gases can advantageously signal a water shortage in the evaporating chamber early, so that a water reservoir can be replaced or refilled to fill up the evaporating chamber.
  • the filling level indicator is preferably designed corresponding to an embodiment of the present invention as an optical sensor array, which comprises a light transmitter and a light receiver and is adapted to the water level set point.
  • the evaporating chamber is made in one piece from a transparent material, preferably a PU (polyurethane).
  • the optical sensor array may thus advantageously also be arranged outside the evaporating chamber and inside the housing of the humidifying device and set up such that a light beam sent by the light transmitter into the evaporating chamber is interrupted by the float element when the level of water in the evaporating chamber corresponds to the water level set point.
  • the water level set point corresponds, in turn, to an optimal value of the water level in the normal mode of operation of the humidifying device.
  • the evaporating chamber has a contact surface for transmitting heat from the heater to the water and hence for the evaporation of the water in the evaporating chamber.
  • the float element regulates the water level in the evaporating chamber by sealing the opening of the water feed means when the water level exceeds the water level set point.
  • the water feed means is connected to a separate water reservoir. When water is needed, the water level in the evaporating chamber drops, and the water feed means is opened. Additional water can thus flow from the water reservoir into the evaporating chamber.
  • An embodiment that is characterized in that means are provided for determining a remaining time during which water will still be present in the evaporating chamber from the signal of the filling level indicator and a signal of a flow sensor and for generating a corresponding output signal for display and for triggering an alarm is significant for recognizing an empty evaporating chamber in a timely manner. The user can thus be informed of a remaining time during which water will still be present in the evaporating chamber in a timely manner and replace or refill the water reservoir within this time to guarantee stable respiration operation.
  • the flow sensor is now preferably arranged at the breathing gas outlet channel. As an alternative hereto, the flow sensor may be arranged in the vicinity of the fan, and the signal of the flow sensor is made available by the fan of the humidifying device via a data interface.
  • An embodiment is significant in light of disturbances in the closing of the float element, which embodiment is characterized in that a second float element and a second filling level indicator are provided in the evaporating chamber, the second float element being able to be moved in the evaporating chamber above the level of the water level set point and the second filling level indicator is provided to recognize a position of the second float element above the water level set point. Furthermore, means are advantageously provided for generating a corresponding output signal for display and for triggering an alarm from the signal of the second filling level indicator.
  • Another embodiment is characterized in that the second float element concentrically surrounds the first float element and the second float element advantageously lies on the first float element.
  • a rise in the water level within the evaporating chamber above the water level set point can thus be advantageously recognized by the second filling level indicator as a function of the position of the second float element.
  • Both the first filling level indicator and the second filling level indicator may be designed as a magnetic sensor array, which comprises a Hall sensor and a magnet made integrally in one piece with the particular float element.
  • the present invention is characterized by the process for operating a humidifying device for breathing gases, which process has the following process steps: a) feeding of water in a water reservoir into an evaporating chamber, b) blocking of the water feed means at the evaporating chamber by a float element when a water level set point in the evaporating chamber is exceeded, c) heating of the water in the evaporating chamber by a heater, and d) detection of a lowering of the water level from the water level set point with a filling level indicator as a function of the position of the float element.
  • a signal of the filling level indicator and a signal of a flow sensor can be detected, from which a remaining time during which water will still be present in the evaporating chamber is determined in an advantageous manner according to process step d).
  • a corresponding output signal is generated for display and for triggering an alarm as a function of the remaining time during which water will still be present in the evaporating chamber.
  • FIG. 1 is a schematic view of a respiration system with a humidifying device according to the present invention
  • FIG. 2 is a partial detail from a sectional view of the evaporating chamber of the humidifying device according to the present invention
  • FIG. 3 is a partial detail from a sectional view of the evaporating chamber of the humidifying device according to the present invention with a first filling level indicator and a with a second filling level indicator;
  • FIG. 4 is a schematic view of the evaporating chamber with water reservoir in the “normal operation” state
  • FIG. 5 is a schematic view of the evaporating chamber with water reservoir in the “no water” state.
  • FIG. 6 is a schematic view of the evaporating chamber with water reservoir in the “defective dispensing valve” state.
  • FIG. 1 shows a respiration system with a humidifying device 10 according to the present invention for enriching the breathing gases with moisture.
  • the respiration system contains a fan 11 for providing breathing gas, which is sent into an evaporating chamber 20 via an inspiration tube through a breathing gas feed channel 22 .
  • the breathing gas is heated and humidified above the surface of a quantity of water in evaporating chamber 20 .
  • the breathing gas reaches the patient to be respirated through a breathing gas outlet channel 23 of the evaporating chamber 20 via a tube.
  • An expiration tube returns the expired breathing gas to the fan 11 .
  • the humidifying device 10 comprises a housing 12 with a recess 14 , into which the evaporating chamber 20 can be introduced.
  • the evaporating chamber 20 is in contact in the recess 14 with a heater 16 for heating water of the evaporating chamber 20 .
  • Water of a water reservoir 27 enters the evaporating chamber 20 via a water feed means 21 .
  • the water flows from the water reservoir 27 arranged above the evaporating chamber 20 into the evaporating chamber 20 through the water feed means under the action of the force of gravity.
  • FIG. 2 shows a partial detail from a sectional view of the evaporating chamber 20 of the humidifying device 10 according to the present invention.
  • Water of the water reservoir 27 enters the evaporating chamber 20 through the water feed means 21 .
  • a float element 24 which is guided on the water surface in a floatingly movable manner, is designed to close the water feed means 21 when a water level set point 28 is exceeded.
  • the water level set point 28 corresponds to the level of water in the evaporating chamber during a normal evaporation operation.
  • the float element 24 and the water feed means 21 are designed as a so-called float element valve, wherein the float element 24 and the water feed means 21 regulate the water level in the evaporating chamber by mutual cooperation by sealing the opening of the water feed means 21 , especially when the water level set point 28 is reached. If water is needed in the evaporating chamber 20 , the water level drops, and the opening of the water feed means 21 is enlarged and additional water can thus flow from the water reservoir 27 into the evaporating chamber 20 .
  • FIG. 2 shows a filling level indicator 30 .
  • the filling level indicator 30 is designed as an optical sensor array 34 adapted to the water level set point 28 .
  • the optical sensor array 34 comprises a light transmitter 35 and a light receiver 36 .
  • the evaporating chamber 20 is made in one piece, preferably from a transparent material.
  • the optical sensor array 34 is provided within the housing 12 of humidifying device 10 .
  • the light transmitter 35 and the light receiver 36 are arranged at the evaporating chamber 20 such that a light beam 37 sent by the light transmitter 35 into the evaporating chamber 20 is interrupted by the float element 24 when the level of water in the evaporating chamber 20 corresponds to the water level set point 28 .
  • the light beam 37 does not reach the light receiver 36 at the level of the float element 24 , which level corresponds to the water level set point 28 .
  • the float element 24 comes out of the light path of the light transmitter 35 , so that the light beam 37 sent by the light transmitter 35 will reach the light receiver 36 .
  • a change in the signal of the light receiver 36 signals a lowering of the water to below the water level set point 28 and hence of the water level characterizing the normal operation of the humidifying device 10 .
  • a calculation means 40 for determining the remaining time during which water will still be present in the evaporating chamber 20 is provided.
  • the remaining time during which water will still be present in the evaporating chamber 20 is determined in means 40 from the signal of the filling level indicator 30 , a signal of a flow sensor 41 ( FIG. 1 ), which is preferably arranged at the breathing gas outlet channel 23 , and in the knowledge of the volume of water below the water level set point 28 in the evaporating chamber 20 .
  • a corresponding output signal which informs the user of the remaining time during which water will still be present in the evaporating chamber 20 , is generated for display and for triggering an alarm.
  • flow sensor 41 may also be arranged in the vicinity of fan 11 (not shown), and the signal of sensor 41 is made available in this embodiment by the fan 11 of the humidifying device 10 via a data interface 18 ( FIG. 1 ).
  • FIG. 3 shows another embodiment of the humidifying device 10 according to the present invention, in which a second float element 26 and a second filling level indicator 32 are provided in the evaporating chamber 20 .
  • the embodiment shown is characterized in that the second float element 26 concentrically surrounds the first float element 25 and the second float element 26 advantageously lies on the first float element 25 .
  • the second float element 26 does not contact the water surface in this position.
  • the water level in the evaporating chamber 20 may rise continuously. The feed of more water through the water feed means 21 would not be stopped. The consequence would be a critical rise in the water level in the evaporating chamber 20 .
  • the second float element 26 lying on the first float element 25 floats with the continuously rising water level in the evaporating chamber 20 in the embodiment according to FIG. 3 .
  • the second float element 26 in the evaporating chamber can be moved beyond the level of the water level set point 28 . If the second float element 26 is moved beyond the water level set point 28 , a free light path of the light transmitter-light receiver pair of the second filling level indicator 32 , which was hitherto free, is shadowed by the second float element 26 .
  • Means are provided in this embodiment for generating a corresponding output signal from the signal of the second filling level indicator 32 for display and for triggering an alarm in case of this malfunction of the first float element 25 .
  • FIG. 4 shows a schematic view of the evaporating chamber 20 of the humidifying device 10 according to the present invention with a water reservoir 27 in the “normal operation” state.
  • the evaporating chamber 20 has in the bottom area a contact surface for transmitting heat from heater 16 ( FIG. 1 ) to the water.
  • the water in the evaporating chamber 20 evaporates due to the heat of heater 16 .
  • the first float element 26 regulates the water level in evaporating chamber 20 by sealing the opening of the water feed means 21 when the water level exceeds the water level set point 28 .
  • the water feed means 21 is connected to a separate water reservoir 27 . When water is needed, the water level drops in evaporating chamber 20 , and the water feed means 21 is opened.
  • the first float element 25 floats on the water surface in the evaporating chamber 20 filled with water.
  • water is fed by the water feed means 21 from a water reservoir 27 until the first float element 25 interrupts the feed of water by pressing the water feed means 21 .
  • the light beam 37 of light transmitter 35 is interrupted by the first float element 25 in this state of “normal operation,” so that light beam 37 does not reach the light receiver 36 .
  • a light beam 37 generated by the second filling level indicator is not interrupted.
  • FIG. 5 shows a schematic view of the evaporating chamber 20 of the humidifying device 10 according to the present invention in the “no water” state.
  • the first float element 25 is now below the water level set point 28 .
  • a light beam 37 of the optical sensor array 34 of the first filling level indicator 31 which said light beam is sent by light transmitter 35 , reaches the light receiver 36 in the “no water” state.
  • a means 40 in which a remaining time during which water will still be present in the evaporating chamber 20 is determined (not shown in FIG.
  • the state shown in FIG. 6 is significant in light of disturbances in the closing of the float element, which embodiment is characterized in that a second float element 26 and a second filling level indicator 32 are provided in the evaporating chamber 20 , wherein the second float element 26 can be moved in the evaporating chamber 20 above the level of the water level set point 28 and the second filling level indicator 32 is provided to recognize a position of the second float element 26 above the water level set point 28 .
  • An error has thus developed in the cooperation of the first float element 25 with the water feed means 21 in FIG. 6 , so that the water level in the evaporating chamber 26 rises continuously.
  • the second float element 26 rises and a light beam 37 of the second filling level indicator 32 is interrupted.
  • a critical rise of the water in the evaporating chamber 20 above the water level set point 28 can thus be recognized depending on the position of the second float element 26 . Furthermore, means are advantageously provided for generating a corresponding output signal for display and for triggering an alarm (not shown) from the signal of the second filling level indicator 32 .
  • Both the first and second filling level indicators 31 and 32 may be designed as a magnetic sensor array, which comprises a Hall sensor and a magnet made integrally in one piece with the particular float element.

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Air Humidification (AREA)
US12/706,240 2009-03-30 2010-02-16 Humidifying device for breathing gases Active 2031-04-06 US8505534B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEEP09156682.8 2009-03-30
EP09156682 2009-03-30
EP09156682A EP2236167B1 (fr) 2009-03-30 2009-03-30 Dispositif d'humidification pour gaz respiratoires

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US20100242963A1 US20100242963A1 (en) 2010-09-30
US8505534B2 true US8505534B2 (en) 2013-08-13

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US9689864B2 (en) 2012-02-01 2017-06-27 Invoy Technologies, Llc Method and apparatus for rapid quantification of an analyte in breath
EP3738638A1 (fr) 2012-03-15 2020-11-18 Fisher & Paykel Healthcare Limited Système d'humidification de gaz respiratoire
GB2572693B (en) 2012-04-27 2020-01-01 Fisher & Paykel Healthcare Ltd Humidification apparatus with a sensor cartridge coupled to a heater base via a spine
EP3909633B1 (fr) * 2013-03-14 2023-11-22 Fisher & Paykel Healthcare Limited Chambre d'humidification avec un élément de mélange comprenant des microstructures
EP3043855B1 (fr) 2013-09-13 2020-02-26 Fisher & Paykel Healthcare Limited Raccords pour système d'humidification
GB2584026B (en) 2013-09-13 2021-03-17 Fisher & Paykel Healthcare Ltd A heater base for supplying humidified gases to a patient
GB2558102B (en) 2013-12-20 2018-11-28 Fisher & Paykel Healthcare Ltd Humidification system connections
US10449319B2 (en) 2014-02-07 2019-10-22 Fisher & Paykel Healthcare Limited Respiratory humidification system
WO2015167347A1 (fr) 2014-05-02 2015-11-05 Fisher & Paykel Healthcare Limited Dispositif d'humidification de gaz
CN106535976B (zh) 2014-05-13 2019-04-05 费雪派克医疗保健有限公司 用于呼吸增湿***的可用性特征
US11324911B2 (en) 2014-06-03 2022-05-10 Fisher & Paykel Healthcare Limited Flow mixers for respiratory therapy systems
US11278689B2 (en) 2014-11-17 2022-03-22 Fisher & Paykel Healthcare Limited Humidification of respiratory gases
US10980966B2 (en) * 2014-12-18 2021-04-20 Koninklijke Philips N.V. Liquid chamber decoupling system and method
CN105169544B (zh) * 2015-09-09 2017-04-05 湖州市中医院 一种水位可控的呼吸机加温湿化装置
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WO2008148154A1 (fr) 2007-06-05 2008-12-11 Resmed Ltd Radiateur électrique à application spécifique pour humidification et réchauffage de fumées
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EP0589429A1 (fr) 1992-09-23 1994-03-30 FISHER & PAYKEL LIMITED Humidificateur avec deux clapets à flotteur
DE69323518T2 (de) 1992-09-23 1999-06-17 Fisher & Paykel Befeuchter mit doppelten Schwimmerventilen
US6272933B1 (en) 1997-06-17 2001-08-14 Fisher & Paykel Limited Respiratory humidification system
US20030098022A1 (en) 2001-11-27 2003-05-29 Omron Corporation Nebulizer optimal for patient at home care
US20060213515A1 (en) * 2003-02-04 2006-09-28 Bremner Michael B E Breathing assistance apparatus
WO2008148154A1 (fr) 2007-06-05 2008-12-11 Resmed Ltd Radiateur électrique à application spécifique pour humidification et réchauffage de fumées
US20090090363A1 (en) * 2007-10-05 2009-04-09 Niland William F Hyperthermic humidification system

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US20100242963A1 (en) 2010-09-30
EP2236167A1 (fr) 2010-10-06

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